Steam generator



Oct. 18, 1932. R. M. wARFlELD 1,883,145

STEAM GENERATOR Filed June 24. 1927 5 Sheets-Sheet 1 Oct. 18, 1932.

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STEAM GENERATOR Patented Oct. 18, 1932 UNITED STATES PATENT ori-'ICE ROYM. WARFIELD, OIF-CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, OFONE- THIRD TO STANLEY STEAM MOTORS CORPORATION, A CORPORATION OFDELAWARE STEAM GENERATOR Application filed. June 24,

My invention relates to a steam generator adapted to be used for thelocomotion of vehicles of every kind and description and wherever asmall portable steam power plant '5 can be applied.

An object of the present invention is to provide a novel steam generatorhaving a plurality of spaced banks of tubes so arranged and associatedwith one another as to provide .10 a maximum of surface area for thetransfer of heat units to the circulating medium therein, as likewise toprovide an assembly, the component parts of which may be readily andeasily repaired or replaced.

Another object of the invention is toprovide a novel steam generatorcomprising spaced banks of tubes, the banksof tubes being connected toupright headers such that there vmay be unrestricted expansion and conltraction of the tubes.

A further object of the'invention is to provide a novel steam generatorhaving a plurality of spaced banks of tubes, these banks of tubes beingconnected by suitable means for providing a continuous thermo-siphoniccirculation of the liquid flowing therein; novel means being alsoprovidedy for allowing the liquid in the tubes to vary without affectingthe thermo-siphonic circulation of the liquid.

Another object of my invention 1s to provide a steam generator havingthe sections thereof inclined and criss crossed so that the heatingmedium is completely utilized and l wherein a thermo-Siphon circulationof the water in the generator is eHected thereby preventing caking ofimpurities on the inside of the tubes; during said circulation the waterpasses through large mud drums which permits sediment to settle fromwhere it may be blown off at intervals.

My invention will be best understood by reference to the accompanyingdrawings forming a part of this specification and in which,

Figure 1 is a side elevational View of a steam generator embodying myinvention.

"Figure 2 is a front elevational view of that C? disclosed in Figure 1.

1927. Serial N0. 201,081.

Figure 3 is a rear elevational view of that disclosed in Figure 2.

Figure 4 is a sectional view of that disclosed in Figure 1 and is takenon approximately the line .lr-4 of Figure l.

Figure 5 is a sectional view taken on the line 5 5 of Figure 2.

In the drawings and for the purpose of illustration I have shown thepreferred enibodiment of my invention which consists, of a steamgenerator composed of a plurality of water tubes 10 arranged in sectionsor banks of twenty secured between tube headers 11 and 12, the banks areheld in position .by two unions 13 and 14 at open corners which'allowexpansion of said tubes without setting up eX- cessiv'e strain on any ofthe parts. The unions are secured to bank headers by butt welding to thepoint 16 as shown in Figure 2. In order to make this butt weld the stockfrom which the bank headers are composed is first stamped out in U diesand the portions 17 are drawn out cold for butt welding to the shorttubes 18 which are connected to the tube headers by the unions 13 and14, as hereinbefore described, and the bank headers 19 and 24 are i thenformed into a tube and seam welded.

rlhe banks of tubes, ten in number, are crisscrossed alternately as bestshown in Figure 4 in order that the heat of the fire will be morecompletely utilized and in order that a quicker and more etlicientgeneration of steam nia-y be eected. rEhe headers 19 empty into thelateral water carriers 2O which in turn empty into circulation tubes 21which pass downwardly to the rear end of the mud drums 22 which areconnected at the other end to the other mud .drums 23 by a pipe 24', asclearly shown in Figure 5.

From the rearward end of mud drums 23 water may pass upwardly into thebank headers 24, into the tube headers 12, and upwardly through thebanks of tubes and back through the tube headers 11 to the thuscompleting a cycle.

The water or other liquid whichwmay be used in the operation of thisgenerator isnormally carried to a position approximately half way up inthe U tubes 25 between the lateral water carriers 2O and the vapor drumsbank headers 19,V

26. The vapor from the generator passes into the drums 26 and from therethrough the Connecting tubes 27 to the drums 28 and 29. Some of thevapor also passes through the connecting tubes 30 to the vapor drums 3l.

From the drum 28 tubes 32 connect with cause of the fact that the drumsare conipara- A tively small and in' order for vapor to reach any ofsaid drums it must pass 'to them through some of the small connectingtubes as herein described.

The vapor drums 35 are connected .by cross tubes 36 and the cross tubes36 at the front end of the generator are welded to a downwardlyextending supply tube 37 which opens into a drum 38 which is in turnconnected to a similar drum 39 by vapor tubes 40 which constitute asuper-heater. The drum 39 is connected to a supply tube 4l which has asuppl ot er vapor is taken for power purposes.

From one of the vapor drums 31 a tube 43 extends; said tube passesdownwardly near the rear side of said generator and opens into an outlet44 to which a steam gauge (not shown) will be attached when inoperation.,

The tube 24 which connects the muddruins at the front end of thegenerator, is provided with valves 45 at each end thereof for permittingthe sediment to be blown out ofthe l mud drums whenever desired. Thetube 24 is also connected to a water supply drum 46 which has a valve 47on the other end thereof through which a supply of water or other liquidenters the drums and finds its way to all parts of the generator ashereinbefore eX- plained. To the rear end of the mud drums 23 aresecured outlet tubes 48 having valves 49 therein for permitting thesediment from the mud drums to be blown out in thatdirection, ifdesired.'

Adjacent both ends of the mud drums and the water supply drums are strapmembers 50 which are secured by clamping members 5l and bolts 53. To theends of the rear straps 50 are secured end supporting members 52 securedto the straps 50 by bolts 54, as shown in Figure 5, similarly asupporting member 56 is secured to the strap 50 on the front end of thegenerator by a bolt 57. To the two supporting members at the rear of thegenerator, and the supporting member at the front of the generator whichtogether comprise a three point suspension for the entire generator, aframe member 58 is secured which may be any suitable frame member, andpreferably, the under casing which will be normally secured outlet 42thereon from which steam orl of construction set forth but desire toavail myself of such changes and modifications as come within the scopeof the appended claims.

cla-im as my invention:

l. A vapor generator comprising a plurality of banks of inclined tubesfor containing liquid to be heated; upright headers; means for removablyconnecting said banks to saijd headers,

tangular in form; some of said banks being arranged diagonally in onedirection, andY the other banks arranged diagonally in the oppositedirection for forming a crisscross tor.

2. A vapor generator comprising a plurality of interchangeable banks ofinclined tubes and tube headers for containing liquid to be heated,upright headers, said banks being substantially rectangular in form,some v of said banks being arranged diagonally in one direction, and theother banks arranged diagonally in the opposite direction for forming acriss-cross grid, for increased eiiciency of the generator; each of saidbanks con-V substantially rectangular in form; some of said banks beingarranged diagonally in one direction, and the other banks arrangeddiagonally in the opposite direction for forming a crisscross grid, forincreasing efficiency of the generator; each of said banks connected bymeans of said tube headers at diagonally opposite corners thereof tosaid uprightl headers for permitting expansion* and contraction ofsaidbanks; means for permitting said liquid to flow in a continuousthermo siphon circulation; means for allowing the K liquid level to varywithout cutting off said thermo-siphon circulation.

4. A vapor generator comprising a plural" l ity of interchangeable banksof inclined tubes and tube headers for containing liquid to be heated,said banks being substantially rectangular in form; upright headers;some of said banks being arranged diagonally in one direction,- andtlieother banks arranged diagonally in the opposite direction forforining a crisscross grid, for increasing efficiency of the generator;each vof said banks con'- said banks being substantially recgrid, forincreasing efliciency of the generanected by means of said tube heads atdiagonally opposite corners thereof to said upright headers forpermitting expansion and contraction of said banks; a plurality of vapordrums having means for communicating with each other for holding a largereserve of pressure vapor therein.

5. A vapor generator comprising a plurality oi interchangeable banks ofinclined tubes and tube headers for containing liquid to be heated;upright headers; said banks being substantially rectangular in form;some of said banks being arranged diagonally in one direction, and theother banks arranged diagonally in the opposite direction for forming acrisscross grid, for increasing efficiency of the generator; each ofsaid banks connected by means of said tube headers at diagonaL lyopposite corners thereof to said upright headers for permittingexpansion and contraction of said banks; means for permitting saidliquid to iioW in a continuous thermosiphon circulation; means forallowing the liquid level to vary Withoutcutting oit said thermo-Siphoncirculation; having a relatively large vapor reserve capacn ity in aplurality of relatively small interconnected drums.

6. A steam generator comprising a plurality of interchangeable banks ofinclined tubes for containing Water to be heated; upright headers; saidbanks consisting of a plurality of straighttubes and tube headers,forming substantially rectangular banks; each of said banks beingconnected by means of said tube headers at diagonally opposite cornersto said upright headers for permitting expansion and contraction of saidtubes; means for permitting said liquid to flow-in a continuousthermo-siphon circulation; said means comprising a horizontal lateralWater carrier having therefrom; tubular means extending down- Wardlyfrom said Water carrier to a plurality of mud drums; said mud drumsbeing of an enlarged cross section for causing foreign substances tosettle therein; tubular means extending upwardly from said mud drums forpermitting said Water to tlovv in a continuous thermo-Siphoncirculation; said U tubes permitting the Water level to vary Withoutcutting off said thermo-Siphon circulation; said generator having arelatively large reserve vapor capacity in a plurality of relativelysmall horizontal interconnected drums; and a steam super-heaterconsisting of banks of tubes arranged above, adjacent to, and extendingalong one of said banks.

vapor generator comprising spaced banks of tubes and headers forcontaining liquid to be heated, each bank being of substantiallyrectangular form, the tubes of a bank being at an angle to the tubes ofanother ban upright headers, the opposite corner portions of each bankbeing connected said generator U tubes extending upwardly to saidheaders, and means for completing a circuit With said banks and headers.

8. A vapor generator comprising spaced banks of tubes for containingliquid to be heated, each bank being of substantially rectangular form,and having tube headers at the ends of the tubes of the bank, the tubesof a bank being at an angle to the tubes of another bank, uprightheaders, one end of one of said tube headers being connected to one ofsaid upright headers, and the other end of the other tube header beingconnected to the other of said upright headers, and means for completinga circuit With said blanks and headers.

9. A vapor generator comprising spaced banks of tubes for containing aliquid to be vaporized, the tubes of a bank being at an angle to t-hetubes of another bank, upright headers, the opposite corner portions ofeach bank being connected to a header, and means connected to theheaders for completing a circuit for thermo-Siphon circulation of theliquid.

10. A vapor generator comprising spaced banks of tubes for containing aliquid to be heated, each bank being of substantially rect-angular form,the tubes of a bank being at an angle to the tubes of another bank,upright headers, the opposite corner portions of each bank beingconnected to a header, and means connected to the headers for completinga circuit, for thermo-Siphon circulation of the liquid.

ll. A vapor generator comprising spaced banks of tubes for containing aliquid to be heated, each bank having tube headers at the ends of thetubes of the bank, upright headers at the ends of said banks, ductsconnecting diagonally opposite corners of each alternate bank With saidupright headers, ducts connecting other diagonally opposite corners ofeach of the other banks With said upright headers, and means connectedto the upright headers for completing a circuit for thermo-siphoncirculation of the liquid.

l2. A vapor generator comprising spaced banks of tubes for containing aliquid to be vaporized, each bank having tube headers at the ends of thetubes of the bank, the tubes of a bank being at an angle to the tubes ofanother bank, upright headers at the ends of said banks, the diagonallyopposite corner portions of alternate banks having communicating meansconnected to opposite upright headers, the other diagonally oppositecorner portions of the other banks having communicating means connectedto other opposite upright headers, and means connected to the uprightheaders for completing a cir- 1c uitdfor thermo-siphon circulation ofthe iqui l In testimony whereof I have signed my name to thisspecification.

' ROY M. WARFIELD.

